Concentration self-adapting type ammonia water absorption refrigerating machine

Abstract

The invention discloses a self-adjusting concentration ammonia absorption refrigerator and aims to provide an ammonia absorption refrigerator with concentration capable of self-adjusting according to working conditions. The refrigerator comprises an ammonia absorption and refrigeration system consisting of a solution pump, a generator, a fine stiller, a condenser, a refrigeration agent throttle valve, an evaporator, an absorber, a liquid vessel and a solution throttle valve which are sequentially connected by pipes. A temporary refrigeration agent container is arranged between the condenser and the refrigeration agent throttle valve. During operation, the temporary refrigeration agent container stores a certain amount of ammonia refrigeration agent and realizes adjusting the concentration of the ammonia by adjusting the storage volume of the ammonia refrigeration agent to keep the refrigeration agent maintaining an optimal value and constantly operate under a condition of optimal concentration, thereby improving efficiency and reducing energy consumption. The invention can be widely used in waste heat-driven low-temperature refrigeration places.

Description

technical field [0001] The present invention relates to a refrigeration equipment, more specifically, the present invention relates to an absorption refrigerating machine which uses ammonia as a working fluid and whose concentration can be self-adaptively adjusted as the operating conditions change. Background technique [0002] With the development of society and the growth of population, human beings are facing an unprecedented energy crisis. Reducing energy consumption has become an inevitable requirement for the development of various industries; The demand for refrigeration products such as refrigerators and refrigerators continues to increase, and the energy consumption brought by refrigeration is also increasing. Reducing the energy consumption of refrigeration equipment or developing waste heat refrigeration has become the development direction of refrigeration products. Although the compression refrigerators currently occupying the dominant position in the market h...

AI Technical Summary

Problems solved by technology

The cycle ratio is a ratio that describes the amount of circulation of the refrigerator solution and the amount of vapor. The larger the cycle ratio, the greater the amount of solution circulation required to produce the same amount of vapor, and the lower the refrigeration efficiency at this time. , so in the refrigerator, on the premise of meeting the refrigeration requirements, the deflation range should be increased as much as possible and the cycle rate should be reduced, which means that the concentration of the concentrated solution should be increased as much as possible, and the concentration of the dilute solution should be reduced as much as possible Concentration, and these two parameters are determined by the environmental conditions. The environmental conditions will have different parameter values ​​in different seasons of the year and at different times of the day. In order to ensure the cooling efficiency and the minimum cycle rate, it should be The concentration parameters of the solution are adjusted, but the current ammonia water absorption refrigeration system is a completely closed system, and the solution concentration cannot be adjusted. It is often at the initial stage of operation, according to the characteristics of the operating conditions, to determine a more suitable solution concentration for filling. And in the future operation process, the system remains closed and the concentration remains constant. Generally, in order to maintain the reliability of the operation, the concentration needs to be determined according to the most unfavorable working condition and the maximum cycle rate is selected. This ensures that the refrigerator can adapt to other working conditions. However, when the operating condition is better than the most unfavorable working condition, when the allowable maximum concentration value changes, the concentration cannot be adjusted accordingly, and the deflation range is smaller than the maximum value under this working condition, and the efficiency is lower Low

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